Knockdown culvert.



No. 889,745. PATENTED JUNE 2, 1908. F. S. 8; F H. BEACH. KNOGKDOWN UULVBRT.

APPLICATION FILED SEPT. 6. 1905.

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,FRED S. BEACH AND FITCH H. BEACH, OF CHARLOTTE, MICHIGAN.

KNOCKDOWN CULVERT.

no. seem-a5.

To a lZ whom it may concern:

Be it known that we, FRED S. BEAoH and j Frrcn H. BEACH, citizens of the United States, residing at Charlotte, in the county of Eaton and State of Michigan, have invented a new and useful Knockdown Culvert, of which the following is a specification.

his invention relates to certain improve ments in sectional culverts of that general class designed for use beneath rail-Way tracks, road-ways and the like or in the construction of sewers, conduits and similar structures.

The object of the invention is to provide a strong durable culvert of this character capable of being set up for use without the employment of skilled labor and one in which the several culvert sections may be quickly disconnected and compactly nested for trans ortation or shipment.

urther object of the invention is to form the culvert of a plurality of circumferentially corrugated sections each section of which is provided with a plurality of spaced locking lugs which alternately engage the interior and exterior wall of an adjacent section when the several sections are assein ble (1 understood said sections having their longitudinal A still further obj cot of the invention is to generally improve this class of devices so as to increase their utility, durability and efiiciency as Well as to reduce the cost of manufacture.

Further objects and advantages will appear in the following description, it being that various changes in form, proportions and minor details of construction may be resorted to within the scope of the ap )ended claims.

In the accompanying drawings forming a. part of this specification: Figure 1 is a perspective view of a portion of a culvert constructed in accordance with our invention. Fig. 2 is a transverse sectional view of the same. Fig. 3 is a longitudinal sectional view taken on the line 3-3 of Fi 1. Fig. 4 is a side elevation showing the ocking tongues extended approximately the width of three of the circumferential corrugations.

Similar numerals of reference indicate corresponding parts in all of the figures of the drawings.

The sections 5 are preferably constructed of corrugated sheet metal bent or otherwise edges provided with a series of marginal notches $pecification of Letters Patent. Application filed September 6,

forn'ied into semi-cylindrical shape, as shown, I

Patent-ed June 2, i908. 1905. Serial No. 277,168.

or recesses 6 defining a plurality of spaced locking lugs 7.

The locking lugs 7 are alternately oh" bent inwardly from the longitudinal ed,,., the sections 5 so that when the several-sec tions comprising the culvert are the l lugs on an adjacent section and engage the interior and exterior same time permitting the several sections to 7 expand upwardly when the water in the cuivert freezes.

- Byhaving the several in the manner described conveniently set up for use and culvert sections quicsly detached and compactly nested for transportation or shipment. ttention is here called to the fact that by having the interlocking lugs alternately off set or disposed in staggered lugs of one section'will exert a ing action on the walls of an adjacent section and thereby assist in retaining tbe'several sections in assembled position. It will also be observed culvert section are curved transversely to conform to the circumferential corrugations of an adjacent section and with whibh they sections constructed the culvert may be spring clampinterengage so as to form in effect an aux ihary lock and thus assist in. preventing lon- 9o gitudinal movement ofthe individual sec-, tions, as best shown in Fig. 3 of the drawings. 1

3y curving the lugs transversely to con-l form to the circumferential corrugations of the culvert sections, said lugs also act as. as

the ends in View.

Having thus described the hive is ciannedis:

'A knockdown culvert including a pluassembled ugs on one section will interlock with the,

' alternately ."r walls of said sections thereby to reinforce and strengthen the several relation the so that the locking lugs on each at are of a width apcription it will be tion what ill] iality of substantiaiiy semi-cylindrical cireumfer'entisily corr egated sectionshaving their opposite iongitudinai edges provided with spaced recesses defining intermediate locking iugs sciapted to engage the lugs of an adj-scent section when the several seciions are assembled to form a culvert, said lugs being curved transversely to conform to the circumferential corrugations of an adjacent section with their free ends alteinateh off set, said sections being arranged to break joint with the lugs on one section engaging the iugs of two adjacent sections and with the se m transversely curved portions of the lugs bearing against the circumferential corrfigations on the interior and exterior walls of said sections. i

In testimony that we claim the"i'oregoing as our own we have hereto aflixed our signatures in the presence of two witnesses FRED s. BEACH. FITCH H. BEACH.

Witnesses:

C. M. BEACH, M. CULVER. 

